Fixes incorrect adapter position being sent while calling notify method

[DevAhamed]

When 'clearAllSelections' method is called on a ListSection, notify method is called with incorrect position. This commit fixes the issue. This commit is upstreamed from 2.x branch.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (3.x@945ed97). Click here to learn what that means.
The diff coverage is 100%.

@@          Coverage Diff           @@
##             3.x      #78   +/-   ##
======================================
  Coverage       ?   76.94%           
======================================
  Files          ?       20           
  Lines          ?     1106           
  Branches       ?      167           
======================================
  Hits           ?      851           
  Misses         ?      158           
  Partials       ?       97

Impacted Files	Coverage Δ
...dapter/src/main/java/mva3/adapter/ListSection.java	87.7% <100%> (ø)

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